How do I open it?
There should be an icon in the top left of the screen. You can also use /cs to open/close the main UI.

How do I use it?
I will continue to add more images over time, but the two most confusing menus seem to be the main UI and the character overview, so I've started there.

Main UI Window

Warning: Spoiler

Displays Daily Writs progress when moused over.

Options check boxes

Close the UI

Opens styles UI

Opens enchanting/rune/glyph UI

Opens recipe UI

Opens blueprint/furniture UI

Opens character overview UI

Opens craftable set list. Note: changing the style weight in the styles UI will change it for this list as well.

The alliance wayshrines that are closest to the set selected in the craftable set list. Mouse over for teleport location and cost.

The 12h and 24h timers can be started and reset as needed when you need a timer.

Total items fenced today and total that can be fenced by this character.

Net earnings in gold today. Does not account for the value of accumulated but un-sold items.

The title and version number that I never do anything with.

Clicking on the icons for a column will cause unknown items of those traits and slot to be marked in your inventory and tooltips. Red outlines mean it is not tracking.

The name of the trait with the icon of the trait item. Mousing over shows the trait item's name.

The research grid, color coded by knowledge. Red = unknown by all, orange = known by some, but unknown on this, yellow = known by some, not this, but has item, white = unknown by all, but has item, green = known by this.

Icon of the passive ability that determines materials you are allowed to use in that craft.

Number of known (or in progress) traits for that craft.

Number of unknown traits for that craft.

The passive ability level for that craft.

The rank for that craft.

The number of actively research traits and the concurrent limit for that craft.

Version 1.87 (CS 1.1.0.9)
*Added advanced color coded grid. Red = unknown by all, orange = known by some, but unknown on this, yellow = known by some, not this, but has item, white = unknown by all, but has item, green = known by this.
*Added option to disable this change.

Version 1.85 (CS 1.1.0.9)
*CraftStoreRune, CraftStoreCook, Recipes and Blueprints will now remove anchors when they are not in use
*Exiting crafting stations will now only perform station-specific unload tasks

Version 1.84 (CS 1.1.0.9) - CraftStoreRune, CraftStoreCook, Recipes and Blueprints will now create more controls as needed
Version 1.83 (CS 1.1.0.9) - Properly update researching state immediately after cancelling
Version 1.82 (CS 1.1.0.9) - Fixed Enchanting writs for German (Askedal)

Version 1.78 (CS 1.1.0.9)
*Changed error messages referring to FurniturePreview to ItemPreview.
*Devs: Added CraftStoreFixedAndImprovedLongClassName.IsResearchable() to check if a blacksmithing/clothier/woodworking/jewelry item is needed on any character.

Version 1.75 (CS 1.1.0.9)
*New recipes
*Blueprints are sorted alphabetically (special characters will cause some items to be switched around in non-English clients)
*Provisioning recipes are now sorted by level, then alphabetically
*Moved hide/show toggles for furniture

Version 1.48 (CS 1.1.0.9)
*Provisioning writs in English are now fully accurate.
*Provisioning writs in French should now work.
*Provisioning writs in German will now partially work.
*Removed debug output from enchanting introduced in 1.25.

Version 1.47 (CS 1.1.0.9)
*Fixed marking not working on recipes in the portable list.
*Fixed marks not being removed.

Version 1.26 (CS 1.1.0.9)
*Added Morrowind sets.
*Updated a seemingly unused piece just to be safe.

Version 1.25.1 (CS 1.1.0.9) - Added debug for glyph decon errors.

Version 1.25 (CS 1.1.0.9)
*Fixed another ESO+ bank issue.
*Ensured research updates before trying to research something new.
*Updated research failure text for all languages.
*Added research support for duplicates.

When I went through the addon list trying to turn my addons back on, I found that I had the original CraftStore installed even though it wasn't showing up in Minion. I moved the orignal CraftStore folder to my desktop where ESO wouldn't find it and I haven't seen another lua error since.

The CraftStore UI isn't working for me. I get LUA errors on various lines of code that are all "attempt to index a nil value" error. I don't know if it makes a difference that one of the guilds I'm in is not a trade guild and will never have a vendor. When I type /cs to open the main window nothing happens and I'm guessing it's related to these lines of code. Can you look into this? Thanks!

Not easily because it is using the mouse as a selector and a key. Something like opening an addon: sure, map it to anything. It doesn't need a target. But if you map your Q key to favoriting recipes, then that prevents the Q key from working anytime even outside of that menu. It would also mean still acquiring that the mouse is over something specific and linking those two. It's likely not impossible, but an overhaul of the entire workings of the addon's interactions isn't worthwhile for me.

Thanks for all the replies on this. I did in fact figure out the problem. I use a Logitech mouse and have had "i" mapped to my middle mouse button in the Logitech software forever. In most games this opens the inventory which is what I use it for. When testing this out I unmapped MMB but what I didn't realize is that when I unmapped it in the Logitech software it didn't remap the MMB key (I thought that was the default state). Once I remapped MMB in the Logitech software it is working again.

Not easily because it is using the mouse as a selector and a key. Something like opening an addon: sure, map it to anything. It doesn't need a target. But if you map your Q key to favoriting recipes, then that prevents the Q key from working anytime even outside of that menu. It would also mean still acquiring that the mouse is over something specific and linking those two. It's likely not impossible, but an overhaul of the entire workings of the addon's interactions isn't worthwhile for me.

Nope. Nothing happens at all. No star. No feedback. Nothing. I have a couple friends that use this and it works for them so not sure why it's not working for me. Is there any way to allow mapping of other keys?